It was because of Ning Xi’s deliberate "pressure acting".
Pressure acting was something only very experienced actors could pull off. By deliberately amping up their acting, an actor could put extreme mental pressure on the other party, making them act abnormally, forget lines continually, or more seriously, even leave the other party with a lifelong psychological trauma which would be hard to overcome.
There were very few in the entertainment industry who could do this. The most important thing was that it was very difficult to pick out, as you couldn't be sure whether the other party was just acting really well or was deliberately"pressure acting". Therefore, it could be said that this method could hurt people invisibly, without leaving any trace.
Ning Xi gave him a haughty look. "Of course you can’t simply let loose your ultimate move!"